Operator Overloading (2)

1
Operator Overloading (2)

• Operator function can be implemented as class
  member function
• Then the left most (or only) operand must be an
  class object( or a reference to a class object)
• If the left operand must be a object of a
  different class or build-in type, this operator
  function must be implemented as a non-member
  function( as we did for gtgt, ltlt)

2
Arithmetic operators

• , - , , /, , -, , /
• In header
• class Complex
• friend ostream operatorltlt
• (ostream , const Complex )
• friend istream operatorgtgt
• (istream, Complex )
• Complex operator(const Complex c,)const
• ...

3
implementation

• Complex Complexoperator(
• Complex c)
• Complex sum
• sum.real real c.real
• sum.img img c.img
• return sum

4

• In header
• Complex operator-(const Complex c)
• Implementation
• Complex Complexoperator-(const complex c)
• return Complex(real-c.real, imgc.img)

5

• In header
• Complex operator(const Complex c)
• Implementation
• Complex Complexoperator(const Complex c)
• Complex mul
• mul.real realc.real-imgc.img
• mul.img realc.img imgc.img
• return mul

6

• In header
• Complex operator/(const Complex c)
• Implementation
• Complex Complexoperator(const Complex c)
• Complex div
• double dem
• dem c.realc.real c.imgc.img
• div.real (realc.realimgc.img)/dem
• div.img (imgc.img -realc.img )/dem
• return div
• Completed Complex class
• Header File Implementation file Driver file